Pole-puncturing machine



April 24, 1928.

R. D. VALENTINE POLE PUNCTURING- MACHINE Original Filed June 4, 1923 2 Sheets-Sheet 1 E N M m Mn W 5 HM M mm w R E 8 w AV N G Q J April 24, 1928.

R. D. VALENTINE POLE PUNCTURING MACHINE Original Filed Jl me 4, 1923 2 Sheets-Sheet 2 fizl/erzz or RwmrQlmEA/T/NE Patented .Apr. 24, 1928.

UNITED STATES PATENT OFFICE.

aoBEE'r t. VALENTINE, or MliNNEAPOLIS, mnfNEsorA, Assienon. BY 'MESNE As- SIGNMEN'IS, 'ro NATIONAL POLE & TREATING COMPANY, or MINNEAPOLIS, mm- NESOTA, A coaroRArron or DELAWARE.

roLE-rUNcrUnING MACHINE.

Original application flied June 4, 1928',

Serial No. 643,256. Divided and this application filed June 8,

1926. Serial No. 113,483.

This invention relates to improvements in pole puncturing machines used to puncture the surface of a log or pole to prepare it for treatment with a preserving fluid, the punctures permitting the preservative I to penetrate the desired distance into the surface of the wood. This application is filed as a division of my pending application for pole puncturing machines #643,256, filed June 4., 1923. The subject matter of this divisional application relates to the particular means employed for making the puncture in the wood surface, reciprocating members being employed for this purpose operating alternately as the pole or log is rotated and supportin the puncturing tool which, at the end of the stroke of the reciprocating member in one direction engages the wood surface and penetrates the desired distance therein.

In the accompanying drawings forming part of this specification,

Figure 1 is a diagrammatic View showing the means for supporting the pole during the puncturing operation;

Figure 2 illustrates a section of a pole showing the position and relative arrange .ment of the punctures therein, the rows being spirally arranged due to the rotation of the pole during the puncturing operation;

Figure 3 is an enlarged vertical sectional view of the pole lifting carriage and the movably'mounted pole puncturing frame showing a'pole positioned therebetween and also showing the pole puncturing mechanism.

As shown in Figure 1, the'pole puncturing machine is preferably positioned between two conveyors. These conveyors are of ordinary construction comprising a frame 2 upon which there is mounted a plurality of power-driven rollers 3 operating between suitable guides 4:. A frame 5 is supported upon a plunger 6 and has standards 7 whereon a tilting frame Sis pivotally supported by means of studs 9. An upright guide 10 is'provided at one side of the frame" for a vertically movable carrier 11. This carrier is suitably counterbalanced. A;

- table 12 is provided between the standards 7 and wheels 13 are arranged in pairs and form supports for the log that is to be punctured. The carrier 11 is provided with a toothed wheel 14 adapted to engage the surface of the pole and impart a rotary movement thereto on its supports during the puncturing operation. 15 represents the puncturing knives arranged in groups and the means for operating these knives consists of a plurality of individually operated suppo'rting arms 16 mounted upon a shaft 17 secured to the frame 11. Each one of these arms is preferably constructed of two flat steel bars held in spaced relation by means of a pivot bracket 18 and a cam roller block 19 interposed between the bars and secured thereto. The cam roller block is provided with a socket 20 which has a spring guide rod 21 connected thereto by a pivot pin 22. A flange sleeve-23 is provided on the lower end'of the rod adapted to support a compression spring 24:. The upper end of the spring is seated against a suitable Washer 25 which is in turn supported by means of an adjustably mounted pressure bar 26 secured to plates 27 on the frame 11 by slotted arms 28. vided with an opening beneath the socket 20 in which a cam roller 29 is rotatably mounted upon a pin 30. This roller is yieldingly held against the surface of a cam 31 mounted on a shaft 32 having bearings in the under side of the carrier frame 11. This shaft is driven by a suitable means, not shown. The knife blades 33 are mounted in the holders 15 carried by the ends of the The cam roller block 19 is proarms 16. A plurality of knifeblades are preferably mounted on each arm and as the arms are reciprocatd,'the blades will enter the surface of the wood the desired distance. Suitable separators 34' are provided between the ends of the knife supporting arms to prevent the knifeholders tacting with each other durin the operation of the machine. Spacing locks 35 are provided between the separators to keep them in alignment with the knife holders. Two of the spacing blocks are preferably provided with upwardly extending lugs 36 secured to a cross beam 37 suitably mounted in the carrier frame 11.

It is also desirable that means from conbe provided to prevent the cam rollers 29 from striking the low sides of the cams 31 with a jar when they dropolf the high sides of the cams should the ole or log be removedfrom the machine while in operation. Such means consists in a plurality of spring bufier bars 38 secured to the frame 11. These buflt'er bars'ar'e arranged in ali nment withthe knife supporting bars wit their free ends supported by a rod 39 supported by the separators 34. Normally the free ends of these bars will be held against the lower portions of the spacing blocks by the spring tension of the bars. Sto plates 40 are provided upon the knife hol er blocks to engage the ends of the buffer bars 38 when the arms 16- drop below their normal pole enga ing position, thus preventing the cam ro lers from striking the low sides of the cam with a jolt and jarrring the machine. Means are also provided for lifting the knife supporting arms 16 out of engagement with the cams .31 and retaining them in such inoperative position. A plurality of lifting brackets 41 are secured to a suitable lifting bar 42 in alignment with the knife supporting arms 16. Each bracket 41 is provided with a yieldingly mounted latch member 43 ada ted to enga e its corresponding stop plate on the kni e holder arm when" in 'a raised position. The upper portion of each bracket 41 is apertured to receive a rod 44;.havin its ends projecting through slotted guide p ates 45. Llfting rods 46 are connected to each end I of the rod 44and have their upper ends piv otally connected to arms 47 mounted upon a rock shaft 48 having bearings in the plates 27.. An arm 49 is secured to one end of the line shaft 48 and is connected by a rod '50 to a suitable hand lever 51 pivotally mounted upon a shaft 52. ,Two of the lifting brackets are provided with outwardly extending pins.-

53 adapted to bear' on the beam 37 to'properly sition the brackets and latch members 43 w an being moved into and out of engagelower dotted line position as shown in Figure 3 when the latch members will engage the stop plates 40, thereby retaining the rethe operating cams 31.

placed m position on the carriage, t e

ciprocating'knife supporting armsin an inoperative posltlon or out of engagement with I Operation. The pole to be punctured havin been pole and means for rotating mechanism will be operated and the hand lever 51 thrown from its inoperative to its operative position causing the latch members 43 to become disengaged from the stop plates 40 provided at the ends with knife sup orting arms. 'As' soon as each arm has t us been released from its corresponding latch member, it will be forced downwardly by means of the compression spring 24 until the' cam roller 29 mounted in the arm engages its correspondin operating cam 31. As the cam rotates, t e arm carrying the puncturing knives will be" raised ,against the compression of the spring 24 until it reaches the highestpolnt of the cam. As the-cam continues to rotate, the roller will leave the 'high point of the cam and the arm will be forced downwardly by the action of its spring 24. until the puncturing knives engage the periphery of the turning log. The above described action of the knife supporting arms is similar to a hammer blow, thereby causing the puncturing knives to be driven into the surface of a pole or log with suflicient force to properly puncture or pierce the surfacethereof to receive the preserving flllldi As shown in the drawing, the cams are preferably arranged to .cause theknife su porting arms to operate progressively, s soon as the, pole has made one complete revolution after the puncturing mechanism' has been started, the knife supportingarms Wlll be thrust out ofengagement with the cams 31 and the rotation of the pole stopped,

The carriage will then. belowered and the pole discharged from the machine.

I claim as my invention: a 1.In a pole puncturing machine, means for supporting the end. of the pole to' be punctured, a puncture tool above the aving means for engaging and rotating the pole on its su port, and means for puncturing the sur ace of the pole during such rotatien.

pole I 2. In a pole puncturing machine, ,means for supporting andraising the end of the pole to be punctured, a vertically movable and tiltable puncture tool carrier above the pole, means mounted in said carrier for en- .ga "ng .and rotatingthe pole, said-carrier an said rotating'means resting by gravity upon the pole during the rotating operation,

and means for puncturing the surface. f the pole during such rotation. I v

3. In a pole puncturing machine, means for receiving and raising thepole to its puncturing position, a'puncture tool carrier above the pole, a toothed wheel mounted therein for engaging and rotating the pole, puncturing the pole during its rotation.

4.- In a pole puncturing machine, means for supporting-the end of the pole to be punctured, a vertically movable puncture oted V hammers tool carrier mounted to rest by gravity upon the pole, toothed wheels mounted in said carrier for engaging the surface of the pole and rotating it, and means operating successively between said wheels for puncturing the pole during its rotation.

5. In apole puncturing machine, means for supporting the end of the pole to be punctured, means for rotating it, and pivfor carrying puncturing knives arranged for puncturing the pole during its rotation.

6. In a pole puncturing machine, means for supporting the pole to be punctured, means for rotating it, a plurality of hammer arms mounted for successive operation, and puncturing knives carried by said hammer arms arranged for entering the' surface of the pole during its rotation.

7. In a pole puncturing machine, means for supporting the end' of the pole to be punctured, a series of hammer arms, puncturin'g knives mounted in said hammer arms to enter the wood and expose the ends of the fibres, and means for raising and lowering said arms to force-said knives into the surface of the pole.-

8. In a pole puncturing m'achine, means for supporting the pole to be punctured, a series of pivoted hammer arms and puncturing knives mounted therein, means for resisting the and a series of cams mounted to progressively engage said arms and raise them against the tension of point in the'movement of said cams.

9. In a pole puncturing machine, means for supporting the end of the poleto be punctured, a series of oscillating hammer arms, and means for raising and lowering them, pole puncturing knives mounted in said arms, means for rotating the pole during the puncturing operation, said knives being adapted to oscillate in their-supports knife-supporting arms for contacting upward movement of said arms,

said yielding means and allow themto drop at a predetermlned.

ed pivotally arms are operated of the pole,

ingthem downwardly to drive said knives into the pole, and means for yieldingly checking the downward movement-of said knife-supporting arms.

11. In. a pole puncturing machine, means for supporting and raising the end of the pole to be punctured, a carrier above the pole, means for engaging and rotating the pole, a series of arms mounted insaid carrier, pole puncturing knives carried by said arms, means for raising said arms and forc ing them downwardly to drivesaid knives into the pole, and means for yieldingly checking the downward movement of said knife-supporting arms, said means comprising buffer bars and stops provided on said with said buffer bars.

12. In a pole puncturing machine, a carriage adapted to receive and supportthe end ofthe pole to be punctured, a ram for raising said carriage and the. pole supported thereon, a carrier having a vertical movement above said carriage, toothed wheels mounted in said carrier in position to con-- tact with the surface of the pole when said carriage is raised, the contact of the pole with said wheels raising saidcarrier so that its weightoperates to force the teeth of said wheels into the pole, means for revolving said wheelsto turn the pole on said carriage, and a plurality of pole puncturing knives mounted in said carrier for engaging and puncturing the surface of the pole progressively and successively; as the pole is turned. 13. In a pole puncturing machine, a pole supporting carriage, means'for rotating the pole, hammer arms, means'for operating the hammer arms, and puncturing blades mountthereon and arranged to enter the surface of the pole when the .hammer. and follow the rotation of the pole durlng 14. In a pole puncturin machine, an arm, a knife holder pivoted t ereon, means for yieldingly resisting the movement of said holder on its pivot, and a puncturing blade mounted in said holder to enter the surface said holder yielding to allow said puncturing blade to follow the rotation of the pole.

In witness whereof, .I have'hereuntoset my hand this 1st day of June, 1926;

ROBERT D. VALEIYTINE. v

the puncturing operation. 

